J.E. Mainer (July 20, 1898 – June 12, 1971) was an American old time fiddler. Joseph Emmett Mainer grew up on a farm in the mountains near Weaverville, North Carolina and learned to play the banjo and fiddle from an early age. Since Wade, his brother, also was interested in learning to play the banjo, he left that to Wade and concentrated on the fiddle. Soon, Mainer began performing at local country barn dances. He found work at a textile mill in Knoxville, Tennessee but moved to Concord, North Carolina in 1922 for another work in a mill.